烟尘

Techniques are applied for the sorption of rhenium from the leaching solution of the fume of calcinating molybdenite concentrate by 201×7 strong base anion exchange resin.

用201×7强碱性凝胶型离子交换树脂对钼精矿焙烧烟尘浸出液中的铼进行分离富集工艺条件研究。

The results showed that the heavy metals in various mediums were mainly Cu and Ni, and those concentrations were, in the descending order, in ditch, tailings, slagheap and cultivated soil. In the tailings and the sludge of the ditch, the concentrations of Ni were obviously higher than those of Cu. Whereas, in the soil and the weathering and atmospheric deposition of the waste slagheap surface, the concentrations of Cu were higher than those of Ni. This means that in the first two mediums, Cu and Ni mainly originated from the tailings, while in the latter two mediums, Cu and Ni mainly came from the atmospheric deposition of airborne particles of the smelting. Cr and Zn were mainly in residual fraction, Cu was mainly in oxidizable and residual fraction.

结果表明：不同区域环境中重金属呈现不同程度累积，其中以Cu、Ni最为显著，含量由高到低依次为尾矿坝排污沟＞尾矿坝＞废渣堆＞农田土壤；尾矿砂和沉积物中重金属分布以Ni含量显著高于Cu含量为特征；而农田土壤和风化物及降尘中重金属分布以Cu含量高于Ni含量为特征，前者Cu、Ni主要来源于尾矿，后者与冶炼烟尘排放有很大关系；样品中除Cr、Zn以残渣态为主外，Cu、Ni、Pb化学形态分布有较大差异，Cu以可氧化态和残渣态为主，Ni以可还原态为主，其次为弱酸提取态，Pb以可还原态为主，其次为残渣态。

Paraffin wax for instance is made from petroleum and produces carcinogens and soot when burned.

比如石蜡是石油燃烧时产生致癌物和烟尘。

They also produce approximately 90% less soot than paraffin candles.

他们还制作了近90%，比少烟尘石蜡蜡烛。

This project is aimed to directly measure the concentration and particle size of particulate matters in exhausts.

本项目研究的目的在于直接测量烟尘和粉尘颗粒物的排放浓度及粒径大小。

Based on the characteristics of the parallel sampling monitor combined with SYC-- III peto tube, a calculating program for parallel sampling of stack dusts has been compiled, which is to some extent versatile .

结合SYC--Ⅲ型皮托管平行采样测试仪的特点，编制了具有一定通用性的烟尘平行采样计算程序。

We are raveling by train.Out the windows,we drink in the passing scene of cars on nearby highways,of children waving at the crossing,of cattle grazing on a distant hillside,of smoke pouring from a power plant, of row upon row of corn and wheat,of flatlands and valleys,of mountains and rolling hillsides,of city skylines and village halls.

乘着火车，我们领略着窗外流动的景色：附近高速公路上奔驰的汽车、十字路口处招手的孩童、远山上吃草的牛群、源源不断地从电厂排放出的烟尘、一片片的玉米和小麦、平原与山谷、群山与绵延的丘陵、天空映衬下城市的轮廓，以及乡间的庄园宅第！

The paper,according to the analyzing of lead dross reverberator dust,put forward the new technics indium distilling by sulfuric acid leach ing,P204 extraction,sulfuric acid washing,hydrochloric acid reverse extraction,zinc replacement,smelting,electrolysis,casting etc.

研究分析了铅浮渣反射炉烟尘的性质和特点，提出了二段硫酸浸出、P204萃取、硫酸洗涤、盐酸反萃、锌板置换、压团熔铸、电解铸型的提铟新工艺，并进行了全流程的试验研究，明确了各工序的工艺技术条件。

Second, Pyrometallurgical, available blast furnace, shaft furnace, rotary furnace, reverberatory furnace and take them two or three kinds of combination, but there are common problems in the smelting process, the emissions of a large number of products containing lead, sulfur dioxide and other harmful ingredients dust smoke, dust need to configure the corresponding device.

二，火法，可用高炉，竖炉，旋转炉，反射炉，把他们两个或三个种的组合，但也有在冶炼过程中常见的问题，一个含有铅，二氧化硫大量产品的排放量，其他有害成分粉尘烟尘需要配置相应的设备。

This paper describs recovering rhenium from smoke of molybdenum concentrate roasting by the hydrogen peroxide solution leaching method.

研究确定了钼精矿焙烧烟尘中铼可用双氧水浸法回收，并通过单因素及正交试验得出了适合浸出铼的条件是∶液固比4∶1，浸出时间2 h，浸出温度60℃，且浸出率可达88%以上。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。